From within that event, you can indicate that the user's value is invalid by setting the Error Text value of the cell or row.
When you display data entry functionality to users, you frequently have to validate the data entered into your form.
For example, for a Your response was great and saved me lots of time.
Is there a way to change the dgv cell Style Format and cell Tag from within the Cell Validating event?
Those that need help in understanding schemas will find the Schema Tree inestimable, and developers maintaining other schemas will save learning time with this XML editor.
These things I can do quite easily, but as you can't attach Key Press events to individual Data Grid View cells, I'm not sure what to do.Freeware XML editing and validation tool XMLFox is a freeware editor for creating valid well-formed XML documents and/or XSD Schema.XMLFox schema editor enables you to easily develop advanced data models expressed in XSD Schema.In this walkthrough, you will retrieve rows from the column and tries to leave the cell, the Cell Validating event handler will examine new company name string to make sure it is not empty; if the new value is an empty string, the Data Grid View will prevent the user's cursor from leaving the cell until a non-empty string is entered.To copy the code in this topic as a single listing, see How to: Validate Data in the Windows Forms Data Grid View Control.It is the XML Schema Editor to provide a synchronized split-pane interface that simultaneously shows both a visual XML Schema Diagram and the underlying code, with changes in one pane immediately reflected in the other XMLFox includes XML View, XML Tree, XML Grid, and XML Script modes for editing.